基于矢量网络分析仪的信道链路标校方法

VNA based channel delay measurement and calibration method

卫星导航系统中收发信道链路的时延标定与测量对系统性能和定位精度具有重要意义,介绍了常见的收发设备零值标校方法,重点分析了基于矢量网络分析仪的绝对时延测量方法,通过校准和测量原理以及测量精度的比较,突出了基于矢量网络分析仪的梳状波发生器法(SMC+Phase)进行时延测量的优势。

The delay calibration and measurement in T/R（transmitter and receiver） channel of satellite navigation system is significant for system performance and positioning precision.In this paper,the zero value calibration methods of common T/R equipment is briefly introduced,and the measurement of absolute delay based on VNA（Vector Network Analyzer）,also known as comb generator based SMC＋Phase method,is thoroughly investigated,which indicates that the SMC＋Phase has great advantages on delay measurement.